AAIM: To investigate the effect of Zener diode on the output of a power supply
unit.
230v/OSW
50Hz: '. <
, ,
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(a) Connect the circuit as shown in figure 2.
(b) Ask the supervisor to check the circuit connection.
(c) Copy Table 2 into your answer booklet.
314
1
Table 2
3
5
7
9
(d) Close switch (SW).
(e) Adjust the load resistor (RL) until the ammeter reads 1 mA.
(f) Read and record the corresponding voltmeter reading in Table 2.
(g) Repeat steps (e) and (f) for the other values of current in Table 2.
(h) Plot a graph of voltage (V) on the vertical axis against current (1) on the
horizontal axis.
(i) From the graph, state the effect of the Zener diode on the output voltage.
The candidates were expected to connect the circuit as shown, measure and
record voltage (V) in Table 2, plot a graph of voltage (V) against current (1) and
state the effect of the Zener diode on the output voltage.
